Google has enhanced the Show Details option in Google Reader.
When you click on Show Details while reading a feed, you would be able to check out the pattern and frequency of new posts by the author of that feed.
It also displays your reading pattern. So you would know the days when you have read the feed.
Getting to know the posting frequency of your favourite blogs can help you in many ways.
If you want to go on the lines of your favourite blogger then you should be checking your favourite bloggers posting frequency and pattern using the Show Details option in Google Reader.